WASHINGTON (AP) — The U.S. Postal Service is warning that it will likely default on up to $6.9 billion in payments for future retiree health benefits for the fifth straight year.Postmaster General Megan Brennan stressed an urgent need for federal regulators to grant the Postal Service wide freedom to increase stamp prices to cover costs.

Blink Health LLC, a provider of consumer price discounts for prescription drugs, said it has terminated its relationship with Express Scripts Holding Co., a pharmacy-benefit manager that helped arrange the new price break for Lilly’s insulin.